On Sat, Sep 22, 2001 at 04:51:42PM +0200, Alex van den Bogaerdt wrote: > > I need this for sum kind of summing up over severaly rrd files. > > It's even no solution to set the values to 0 while graphing because I > > already distinguish zero and undef value there, and a definitly want zero > > values in the rrd. > > It is possible to change unknowns into zero only for a specific time > range. However, this means that you need to alter your scripts and > you may not want to do that. If you want to give it a try anyway: > > Suppose you'd like to change unknowns encountered before januari 1st 2001. > TIME,978303600,LT results in a true value if the time from the value > is before that date. If you know for sure the RRD was created at that > date, you can just change any value (always unknown) into 0: > > DEF:old= (etcetera) > CDEF:new=TIME,978303600,LT,0,old,IF > > This will result in 0 if the entry was before time 978303600 and it will > return the real value from the DEF if not. All other unknown data will > remain in the result as it is not touched. > > > If you know you will encounter this problem in the future, you may > want to fill your databases with zeros at create time. This can be > done as I described. > 1) create a database that ends well before "now". The difference in > time should be at least the amount of time that is stored in the > largest RRA > 2) The DSes should be GAUGE. The heartbeat should be large enough to > accomodate for a huge update > 3) update the database with value 0 and time "now" > 4) use "rrdtool tune" to set the correct DS type and heartbeat > > The update will fill the entire RRD with zero, resulting in a database > that has a known history, not an unknown history. The end time is 'now' > just as for a normally created rrd file.
This seemed to be a lot of work, so I tried my first idea first, and it was much more easy that I expected. I will try your suggestion for in my main script some time. Thank you! -- Binary/unsupported file stripped by Listar -- -- Err : No filename to use for decode, file stripped. -- Type: application/pgp-signature -- Unsubscribe mailto:[EMAIL PROTECTED] Help mailto:[EMAIL PROTECTED] Archive http://www.ee.ethz.ch/~slist/rrd-users WebAdmin http://www.ee.ethz.ch/~slist/lsg2.cgi
